This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A247252 #11 Dec 03 2014 23:22:48 %S A247252 4,4,1,6,18,4,4,8,6,24,6,6,10,4,12,24,8,20,4,12,20,28,18,8,12,18,6,12, %T A247252 8,22,4,6,4,12,8,6,24,6,4,36,18,36,20,4,24,20,30,4,24,6,16,52,6,18,6, %U A247252 30,42,18,30,24,4,6,24,6,6,8,8,6,12,12,24,8,26,12,10,16,6,12,8,42,14,10,18,6,8,12,30,36,48,22,12,14,4,12,20,16,6,6,6,20 %N A247252 Smallest integer k>=1 such that k*prime(n) is the sum of two successive primes. %C A247252 Except for a(3)=1, all terms are even and >= 4. %H A247252 Zak Seidov, <a href="/A247252/b247252.txt">Table of n, a(n) for n = 1..1000</a> %F A247252 a(n) = A203836(n)/prime(n). %e A247252 If n=1, prime(1)=2, and 4*2 = 8 = 3+5 is the sum of two consecutive primes, thus a(1) = 4. %Y A247252 Cf. A000040, A001043, A203836, A247245. %K A247252 nonn %O A247252 1,1 %A A247252 _Zak Seidov_, Nov 29 2014